Energy Resolution Performance of the CMS Electromagnetic Calorimeter

The energy resolution performance of the CMS lead tungstate crystal electromagnetic calorimeter is presented. Measurements were made with an electron beam using a fully equipped supermodule of the calorimeter barrel. Results are given both for electrons incident on the centre of crystals and for electrons distributed uniformly over the calorimeter surface. The electron energy is reconstructed in matrices of 3 times 3 or 5 times 5 crystals centred on the crystal containing the maximum energy. Corrections for variations in the shower containment are applied in the case of uniform incidence. The resolution measured is consistent with the design goals

The electronic chain and the performance of the CMS electromagnetic calorimeter and the discovery reach of radion → hh → γγbbâ»

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Search for radion decays into Higgs boson pairs in the γγbb,τ+tau−bb\gamma \gamma b b,\tau^+ tau^- b b and bbbbbbbb final state

The CMS discovery potential for radion decays into two Higgs bosons in the gamma gamma b b, tau+tau- b b and bbbb final states is studied. The case of a radion mass of 300 GeV and a Higgs boson mass of 125 GeV/ is considered. The discovery reach with 30 fb^-1 in the plane of two parameters of the Randall-Sundrum model, xi and Lambda_phi, is evaluated

Structure, ratios and patterns of release in the sex pheromone of an aphid, Dysaphis plantaginea

Insect communication is primarily via chemicals. InAphidinae aphids, the structure and ratio of iridoid(monoterpenoid) chemicals are known to be importantcomponents of the sex pheromone. However, for enhancedspecies specificity, it has been suggested that release of sexpheromone might be restricted to a narrow time periodwithin the diel cycle. Here, we determine the structure,ratios and release patterns of iridoid chemicals producedby a serious global pest, the rosy apple aphid, Dysaphisplantaginea. Volatiles were collected from batches ofoviparae (sexual females) and chemicals identified bygas chromatography, mass-spectrometry and microscaleNMR spectroscopy. (1R,4aS,7S,7aR)-Nepetalactol and(4aS,7S,7aR)-nepetalactone were detected in a 3.7:1 ratio.To investigate timing of release, we constructed asequential sampling device that allowed volatile chemicalsto be captured hourly from 95 same-aged oviparae over20 consecutive days. Release patterns of the two sexpheromone components show that D. plantaginea oviparaerelease high levels of the two components duringphotophase and low levels during scotophase. Release ofthe two components increased significantly during the first3·h of photophase and thereafter remained at a high leveluntil the onset of scotophase. The ratio of (1R,4aS,7S,7aR)-nepetalactol to (4aS,7S,7aR)-nepetalactone released did notchange significantly between days two to 14 of the adultstadium, but from the 15th day onward there was asignificant decrease in the relative amount of(1R,4aS,7S,7aR)-nepetalactol. Pheromone release wasgreatest on the eighth day of the adult stadium, with up to8.4·ng of pheromone released per ovipara per hour. This isthe first report on the full structural identification andratios of volatile iridoid components collected from D.plantaginea oviparae and is also the most detailed temporalstudy on sex pheromone release from any aphid species.The lack of a temporally narrow and distinct period of veryhigh sex pheromone release suggests that alternativemechanisms or factors for species recognition and isolationmay be important. Findings are discussed broadly inrelation to the biology of the aphid

Millimeter waves as a source of selective heating of skin

International audienceThis study demonstrates that 20-100 GHz range can be used for spatially-accurate focusing of heating inside the skin achieved by varying frequency and exposure beam size, as well as by enforcing air convection. The latter is also used to reduce overheating of skin surface. Heating at different skin depths depending on these parameters is investigated in detail using the hybrid bio-heat equation. In particular, it is shown that decreasing frequency and/or increasing exposure beam size at forced airflow result in elevation of heating of deeper layers of tissue and decrease of skin surface temperature. Changes of water content within 15%, which exceed those due to aging and presence of tumors, only slightly affect heating. Exposure intensity necessary to reach a target temperature significantly increases in different areas of body with elevated blood flow. Dependence on exposure intensity and hyperthermia treatment duration is also investigated and discussed. Results of this study suggest that the lower part of the millimeter-wave range is an attractive alternative for non-invasive thermal treatment of skin cancer with a high spatial resolution. Bioelectromagnetics. 36:464-475, 2015. © 2015 Wiley Periodicals, In